Window operating mechanism



Feb. 24, 1942. D. L; CHANDLER ET AL WINDOW OPERATING MECHANISM 3 Sheets-Sheet 1 Filed Feb. 15, 1940 Feb. 24, 1942. D. L. CHANDLER ETAL 2,274,265

WINDOW OPERATING MECHANISM Filed Feb. 15, 1940 3 Sheets-Sheet 2 Feb. 24, 1942. D. L. CHANDLER ETAL I 2,274,255

WINDOW OPERAT ING MECHANISM Filed Feb. 15, 1940 3 Sheets-Sheet 3 "7 i071? 2 Zpage 2 (3% Whey Patented Feb. 24, 1942 WIND OW OPERATING MECHANISM Daniel L. Chandler, Salem, George W. Ewing, Peabody, and Frank H. Walker, Salem, Mass, assignors to Aresee Company Inc., Salem, Mass, a corporation of Massachusetts Application February 15, 1940, Serial No. 319,036

3 Claims. (Cl. 268-124) Our present invention relates to electrical door driving mechanism, and more particularly to a particular means for varying the speed of an alternating lever which actuates the raising and lowering mechanism of an automobile window, the alternating lever being actuated by a crank connecting with an electrical motor.

This invention is a continuation in part of our co-pending application entitled Electrically operated window, Serial Number 302,082, filed October 31, 1939.

Inour co-pending application, the window actuating lever, which is the same in our present application, carries certain finger members. One of these fingers is pivoted above the pivot of the actuating lever and the other finger is pivoted below the said lever pivot. Each of said fingers when the said lever is thrown to its extreme position is out of contact with certain portions of the mechanism with which it engages on its forward movement.

When a continuous drive is provided, as in our continuous electrical apparatus, as set forth in the said co-pending application, the engagement of the said fingers with the raising and lowering mechanism produces an objectionable clash which is due to the contacting of the fingers with such apparatus.

Our present application is concerned with an improveddrive which quickly takes up this lost motion and gently engages the said fingers with the raising and lowering apparatus in a smooth and silent manner thereby eliminating the objectionablenoises.

As the present specification progresses, we will point out in further detail just how this is accomplished.

The principal object of our present invention is an improved drive for electrically operated automobile window raising and lowering mechanism;

Another object" is a crank mechanism adapted to vary the speed of the crank-throw changing the speed of crank thrust at predetermined points throughout a complete cycle, and

Other objects and novel features comprising the construction and operation of our invention will appear as the description of the device progresses.

In the drawings illustrating the bodiment of our invention:

Fig. 1 is a fragmentary side elevation of the inside of an automobile door showing the driving mechanism as connected with the window preferred em-.

tions of the door panel being broken away to show parts of the inner mechanism;

Fig. 2 is a fragmentary broken away elevation more particularly showing the cam slot in the.

window raising and lowering mechanism;

Fig. 3 is a fragmentary side elevation of the window raising and lowering apparatus, portions of the glass sash being broken away for convenience in illustration. Inthis figure the apparatus is viewed from the opposite side with re spect to Figs. 1 and 2;

Fig. 4 is a fragmentary view of the drive shown in Fig. 1 but viewed from the rear; I

Fig. 5 is a view similar to Fig. 4 but showing the drive mechanism slightly advanced from the point shown in Fig. 4, and

Fig. 6 is a cross-section taken on the line 8-6 of Fig. 5 showing the method of forming a groove for the belt in the periphery of the sheave member. 7

As previously stated, our present invention is an improvement of the drive mechanism, as set forth in our co-pending application. However, this improved drive may be used forother similar requirements.

In Fig. 3 We will briefly describe the window raising and lowering mechanism so that the present drive improvement will be clearly understood.

1 At l0 we have indicated an automobile window pane vertically slidable in conventional guideways II. The window pane I0 is elevated and lowered by means of arms l2 and I3 which carry rollers on their free lower ends and said rollers are engaged in channel members I4 attached to the lower side of the window pane edge member [5 The other ends of the arms I 2 and I3 terminate in attached pinion members I6 and I1 respectively being interlocked by means of the gear teeth shown. The pinion I1 is further provided with a large segment l8, the outer periphcry of which is provided with a plurality of V shaped teeth l9 spaced away from each other by extended slots 20 the sides of which are parallel. The segment 3 and pinions l6 and I! are mounted on a base member 2| which is mounted on the inside door panel 22 at points 23.

Radially disposed in the base member 2| are cam slots 24 and 25.

raising and lowering actuating lever, certain por- Pivoted at 29 and 30 respectively are the finger members 3| and 32. By inspection, it will be noted that the forward ends of the fingers 3| and 32 are V shaped to engage the V sides of the teeth IS on the segment I8.

With the setting of the apparatus, as shown in Fig. 3, the lower finger 32 is at the end of its stroke and engaged in the slot 28 while the upper finger 3i is at its extreme rearward position. When the lever 2'! is reversed by the reciprocating lever 28 and thrown to the right, as viewed in Fig. 3, the finger 32 is pulled out of the slot 2|] and the V end of the finger 3| engages against the upper side of the V tooth. I9 .directly in front of the finger 3|. This lost motion period between the point of the finger3| and its engagement with the upper side of the tooth l9 produces a clash which is noisy and undesirable in an apparatus of this kind. When the lever 21 is returning from the right extreme the same action takes place on the finger 32.

As set forth in our co-pending application, the setting of the fingers, with respect to the contacting side of the teeth I9, is controlled by the reversing slide 33 which is actuated manually. The electrical contacts 34 are connected by the common connector 35 in the same manner as-in the co-pending application above referred to.

On the back sideof the fingers 3| and 32 is provided the cam studs 38 which engage against the sides of the cam slots 24 and 25 in the base ,'member 2| and guide the fingers 3| and 32.

These cam slots 24 and 25 are radially disposed to the segment l8.

Below the window pane l8 and inside the door panel 22, we have mounted our improved drive which comprises an electric motor 48 which is connected to a sheave 4| by means of a flexible belt 42.

The sheave 4| is provided with a crank lever 43, one end of which is pivoted to the reciprocating lever 28, at 44. The crank lever 43 is journaled in one of the spokes of the sheave by means of the shaft 45. On the inside of the shaft 45 remote from the lever 43 is mounted another lever 46. The levers 43 and 45 are both keyed to th shaft 45 by means of the key 41. On the free end of the lever 48 is pivoted a cam roller- 48.

Secured to the support 49 is an internal cam comprising an outer member 50 and an inner member Between the members 50 and 5| is provided a cam track 52 within which the cam roller 48 travels.

In Fig. 1 and in Fig. 4, the cam roller 48 is positioned. at the high point of the cam. In this position, the lever 28 is at its farthermost swing to the left, as viewed in Fig. 1. In this position, the finger 32 is about to move toward the V shaped teeth l8. As the motor 48 turns the V tooth H! at a reduced speed and thereby obviating the clash which otherwise will result.

The cam roll 48 travels along the cam track 52 in the manner shown in the drawing half way around or until the finger 32 has reached its innermost position in the segment slot and is ready to return. At this position, the upper finger 3| is in its most rearward position comparable to the same position of finger 32, at its start of the above described movement. At this time th cam roll 48 has reached a position approximating 68 on the cam track 52. Again the cam track 52 moves in toward the pivot center of the sheave 4| and the finger 3| moves quickly toward the V tooth |9 in the same manner as did the finger 3| gently engaging the side of the V tooth I9 and continuing on at a reduced speed to the slot 20.

The cam track 52 is so proportioned with respect to the pivot center of the sheave member 4| that the speed of the fingers after having quickly taken up the lost motion between the fingers 3| and 32 and the teeth |6, is approximately uniform.

Normally, the movement of the reciprocating lever 28 is speeded up at the two points located at ninety degrees to horizontal plane through the pivot point of the sheave 4| and the lever shaft 45. With our arrangement of the cam track 52 and the levers 43 and 48, the movement of the lever 28 is maintained at a constant speed at all times except that point when the point of the fingers 3| and 32 are moving into contact with the sides of the V shaped teeth H3.

sheave 4|, in the direction of the arrow, in Fig. 1, I

the cam roll 48 in the cam path 52 is drawn inwardly toward the pivot point of the sheave 4| to a point approximating a position 53'. As the cam roll 48 follows the cam path 52 inwardly toward the pivot point of the sheave 4| the movement of the reciprocating lever 28 is accelerated in speed from what would otherwise have been its normal movement. As a consequence, the lever 21 is swung back at a corresponding accelerated speed which brings the point of the finger 32 over to the side of the V shaped tooth I3 quickly. At this point of movement of the finger 32, the cam roll 48 reaches its lowest point on the cam path 52 and the speed of the said finger slows up bringing the pointed end into contact with the side of the The drive between the sheave 4| and the pulley on the motor 48 is indicated at 42. This belt is composed of rubber of a very high tensile strength similar to that used on the outer tread of automobile tires. The belt 42 is under tension at all times and because of its elasticity and tensile strength provides a very flexible and efficient means for driving the sheave 4|.

The sheave 4| is preferably made of. sheet metal. The periphery is provided with a plurality of alternately bent flanges 65, the belt 42 riding between these flanges, as shown in Fig. 6.

It will thus be seen that we have designed a drive in which the motor runs at a continuous given speed thereby imparting a constant rotational speed to the sheave 4|, but due to the cam track 52 and the crank levers 43 and 46, the crank lever 28 is maintained, in either direction, at a constant speed excepting that period in which the cam roll 48 moves quickly toward the sheave center, the result of which is to speed upthe movement of the lever 28, at such point. Throughout the rest of the travel of the cam roll in the cam path 52, the reciprocating lever 28 is maintained at a constant rate of movementcompensating for the ever changing position of the crank lever 43 due to the cam path 52. The result of such compensated movement of the reciprocating lever 28 is to impart to the window raising and lowering mechanism a smooth continuous speed movement directly imparted from a reciprocating lever which is rotating at a continuous speed thereby eliminating the jerking motion otherwise resulting. v

Having thus described our invention what we claim as new is:

1. In combination with a windowraising and lowering mechanism having a base member and a segmental member pivoted thereon with V pointed teeth located on its periphery, and an operating lever having V pointed cam fingers pivoted thereon with back portions engaging with a cam finger slide slidably mounted on said base member, the V pointed portions of said cam fingers engaging against the V sides of said V pointed teeth on said segmental member, an oscillating lever pivoted to said operating lever,

the said oscillating lever having a lost motion a segmental member pivoted thereon with V pointed teeth located on its periphery, and an operating lever having V pointed cam fingers pivoted thereon with; back portions engaging with a cam finger slide slidably mounted on, said base ,member, the V pointed portions of said cam fingers engaging against the V sides of said V pointed teeth on said segmental member, an

' oscillating lever pivoted to said operating lever,

the said oscillating lever having a lost motion period at the beginning of each oscillating movement, a continuous rotating sheave, a crank lever arm pivoted to one side of said sheave, a reciprocating lever connecting said crank arm with said oscillating lever, a fixed cam track located adjacent said sheave, a cam and cam lever, said cam lever fixed to said reciprocating arm lever being" pivoted to said sheave, a cam track engaging with said cam, said cam track having a path of varying radial distance from the rotational center of said sheave for the purpose of varying the pivoted position of said reciprocating arm lever with respect to the center of rotation of said sheave.

3. In combination with a window raising and lowering mechanism having a base member and a segmental member pivoted thereon with V pointed teeth located on its periphery, and an operating lever having V pointed cam fingers pivoted thereon with back portions engaging with'a cam finger slide slidably mounted on said base member, the V pointed portions of said cam fingers engaging against the V sides of said V pointed teeth on said segmental member, an

oscillating lever pivoted to said operating lever, the said oscillating lever having a lost motion motion period at the beginning of each oscillating movement, a continuous rotating sheave, a

continuous operating electrical motor, an elastic belt connecting said motor with said sheave, a crank pivoted to one side of said sheave, a cam lever pivoted to the opposite side of said sheave, said crank and cam lever being fixed together and pivoted through said sheave as a unit, a

fixed cam track located adjacent one side of said sheave, a cam pivoted to said cam lever and engaged in said cam track, a pivoted reciprocating lever connecting said oscillating lever with said crank, means located in said cam 

